Window ventilator



Jan. 21, 1930. A. T. JQHANSON WINDOW VENTILATOR Filgd May 26, 1928 1 IIIPatented Jan. 21, 1930 ADOLPH T. JOHANSON,

PATENT OFFIE OF CHICAGO, ILLINOIS WINDOW VENTILATOB Application filedMay 26,

My invention relates to ventilators in general, but pertains moreparticularly, but not exclusively, to appliances of that type which areattached to the window-sash,

whereby the raising or lowering of the latter will automatically expandor contract the ventilator, so that it may occupy a minimum of spacewhen not in use with the window closed.

One of the leading objects of the invention is the provision of anappliance of this character which is simple in structure, which iseconomical to produce, which is effective in action, and which isunlikely to become dan1- 15 aged or injured in ordinary service.

To this end, the preferred structure comprises a plurality of spaced,horizontal, sloping slats associated with end lazy-tongs mechanismsconnected to the companion slid- 29 able Window-sash, whereby suchincluded, slats or blades are expanded and contracted as the sash ismoved up and down to open or close the window.

To enable those skilled in this art to fully 25 understand theinvention, both from struc tural and functional standpoints, in theaccompanying drawing, forming a part of this specification, I haveillustrated in detail a present, preferred embodiment of the invention,and in the views of such drawing, like reference characters have beenemployed to designate the same parts.

In this drawing Figure 1 is a central, vertical section through thewindow-sash and the connected ventilator, showing the window open andthe ventilator in action; and

Figure 2 is a similar view illustrating the window in closed conditionand the ventilator collapsed.

Referring to this drawing, it will be noted that the window-casing hasbeen designated 11, the window-sill 12 and the vertically slidingwindow-sash 13.

The ventilator comprises a suitable number of horizontally-arranged,verticallyspaced, transversely sloping, sheetnnetal slats or blades 14;,each of which at one end has an integral, downturned, cross-flan e 15,longer than. the Width of the blade an con- 1928. Serial No. 280,761.

stituting a link, formed as a unit with the blade or shutter.

The center of each such link flange pivotally connected at 16 to themiddle of a link 17 of equal length and hinged at one end at 18 to oneend of the flange link of the slat or blade just above and hinged at itsopposite end at 19 to the other end of the flange link 15 of the bladeor slat immediately below.

Thus the several connected links 15 and 17 form the well-knownlazy-tongs construction which is easily capable of elongation andshortening.

The lower ends of each lowermost pair of links 15, 17 are pivotallyconnected at 23 to a bracket 24: mounted on the window-sill by screws25, 25 by a pair of short links 21, 22, and, in similar manner, theupper ends of each pair of topmost links 15, 17 are pivotally joined toshort links 26, 27 hinged at 28 to a depending ear 29 on a slopingcoverplate 31 having an upstanding marginal flange 32 fastened to thesides of the windowsash by one or more screws 83.

To close the ends of the ventilator, each end of the latter is suppliedwith an upright, metal plate 34, reaching upwardly from the window-sillthe proper distance, and having an outstanding, border flange 35fastened in any approved fashion to the window-casing and an inturned,marginal flange 36 which covers and conceals the adjacent lazy-tongsstructure.

When the window is closed with the window-sash in its down position, asindicated in Figure 2, the ventilator, as a whole, is collapsed orcontracted, the slats or blades being relatively close together so thatthe structure occupies but comparatively little space in suchinoperative condition.

hen, however, the window-sash is raised to open the window, as shown inFigure 1, the upward travel of the cover-plate 31 expands or elongatesthe pair of lazy-tongs structures at the two ends of the ventilator andthe latter is opened up to afford more space between the slats and totilt the latter to greater degree, whereby to advantageously understandthat this invention,

deflect the entering air currents and to preclude the admission of rainor snow.

The end plates prevent the air from entering the room except through thegaps between the slats and the top plate constitutes an appropriatecover to overlie the space between the ventilator and the window-sashand to form a connecting operating means between the two.

From the foregoing, it will be clear that the ventilator is actuatedmechanically and automatically merely through the usual op erations ofopening and closing the window.

Those acquainted with this art will readily as defined by the appendedclaims, is not limited or restricted to the precise and exact details ofstructure and that these may be modified within comparatively wide andradical limits without departure from the heart and essence of theinvention and without the loss of any of its material and substantialbenefits and advantages.

I claim 1. The combination of a window-casing, a window-sill, awindow-sash slidable in id easing, a plurality of spaced slats eachnaving at each end an integral flange constituting a link, linksconnecting the centers of such flange links to the opposite ends of theflange links above and below it, brackets on said window-sill, linksconnecting the lowermost of said flange links to said brackets, acover-plate mounted on and movable with said window-sash, linksconnecting the topmost flange links to said cover-plate, whereby openingand closing of the window-sash automatically expands and contracts theventilator slats, and end-plates mounted on said window-casing outwardlybeyond said links and having inwardly disposed flanges concealing saidlinks.

2. The combination of a window-easing, a window-sill, a windmv-sashslidable in said. casing, a plurality of spaced slats each having ateach end an integral flange constituting a link, links connecting thecenters of such flange links to the opposite ends of the flange linksabove and below it, brackets on said window-sill, links connecting thelowermost of said flange links to said brackets, 21 cover-plate mountedon and movable with said window-sash, and links connecting the topmostflange links to said cover plate whereby opening of the window-sashautomatically expands and closing of the windowsash automaticallycontracts the ventilator slats, the latter in the open condition of thewindow-sash sloping outwardly downwardly.

In witness whereof I have hereunto set my hand and seal.

ADOLPH T. J OHANSON [L. s.]

